大震下智能隔震结构的能量响应分析  

Investigation to Energy Response of Smart Isolated Structure Under Major Earthquake

作　　者：杜永峰[1] 刘凯雁[1] 邵云飞[1] 

机构地区：[1]兰州理工大学防震减灾研究所,甘肃兰州730050

出　　处：《工程抗震与加固改造》2008年第1期14-18,共5页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金资助项目(50548016)

摘　　要：采用Bouc-Wen模型描述结构的非线性性质,建立了大震下智能隔震结构的绝对运动方程和瞬时能量方程。建立滞变结构状态空间表达式,以作者所在课题组的序列最优控制算法作为半主动智能隔震控制率,求解出结构的非线性地震响应。明确了瞬时输入能与结构位移响应最大值之间的对应关系,据此对智能隔震结构的减震性能作出评价。最后通过对具体算例的分析比较揭示了智能隔震结构在有效减小隔震层位移,控制上部结构响应方面的优越性。In this paper, Bouc-Wen hysteresis model is adopted to describe the hysteretic properties of smart isolations and established the absolute motion and momentary energy equations of structures under major earthquake. Non-linear response of structure is carried out by state space equation combine with Range-Khuta and Sequential Optimal Control （SOC） suggested by author＇ s research team. Analysis of the relationship between displacement and energy is done and some primary energy response indices are selected to evaluate control efficiency of isolated systems. At the end of the paper, a real isolated building is employed as a numerical example to compare effects of different control methods.The result shows the superiority of smart isolated structures in reducing the displacement of isolated layer and controlling the response of super structure.

关 键 词：智能隔震 能量法 BOUC-WEN模型 瞬时输入能 

分 类 号：TU352.12[建筑科学—结构工程]